From: Robust reconstruction algorithm for compressed sensing in Gaussian noise environment using orthogonal matching pursuit with partially known support and random subsampling
Method
The number of multiplication
The number ofâ„“2optimization
OMP
(MN + M)k
∑ t = 1 k ( ℓ 2  optimization for t variables )
OMP-PKS
(MN + M)(k-|Γ|) + |Γ|
∑ t = | Γ | k ( ℓ 2  optimization for t  variables )
OMP-PKS+RS
L[p(MN + M)(k - |Γ|) + |Γ|]
L ∑ t = | Γ | k ( ℓ 2  optimization for t variables )
DCS-SOMP
Lp[(MN + M)k]
L ∑ t = 1 k ( ℓ 2  optimization for t variables )